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Steel grade EN8D


Q. Which organisation has decided the grades of material, e.g.,EN8D grade steel? Is there equivalent grade of this material.

Vijay Shirsat
- Mumbai, Maharashtra, India


A. EN8D is a carbon steel, detailed in British Standard BS970, I have an old copy of the standard, and the composition is as follows:
C 0.40 to 0.45%, Si 0.05 to 0.35%, Mn 0.70 to 0.9%, S <= 0.06%, P <= 0.06%.


Richard Guise
- Lowestoft, U.K.


Q. Is EN8D MATERIAL equivalent to CK 45?

Sarveshwar Singh

March 2015

A. Hi Sarveshwar. They seem quite close in chemical composition and, according to, all of the following are equivalent:

BS 080A40 - DIN CK45 - IS 45C8 - EN EN8D - SAE 1040,1045

... but I don't think we can say that one standard is "absolutely" equivalent to another standard except in terms of meeting a specific and detailed list of requirements. Good luck.


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Ted Mooney, P.E. RET
Pine Beach, New Jersey

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